I haven't seen one of these machines but it looks like knob on left is on/off, knob on right is rotation speed, and it looks like the temperature controller is set with the small buttons on the LED readout. Jobo sources knobs, no one makes an injection molding tool that costs $30,000 to make knobs you can buy for 50 cents a piece. Half the parts in a Ferrari are made by Fiat, that doesn't make it less of a Ferrari, just more reliable
Peace, Mike
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